CN111830192B - Air-mixed fuel gas combustion performance test system and test method thereof - Google Patents
Air-mixed fuel gas combustion performance test system and test method thereof Download PDFInfo
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- CN111830192B CN111830192B CN202010489901.7A CN202010489901A CN111830192B CN 111830192 B CN111830192 B CN 111830192B CN 202010489901 A CN202010489901 A CN 202010489901A CN 111830192 B CN111830192 B CN 111830192B
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Abstract
The invention relates to the technical field of testing of combustion performance of various hydrocarbon air-mixed fuel gases, in particular to a system and a method for testing the combustion performance of air-mixed fuel gases. The testing system comprises a mixed hydrocarbon loop, an air loop, a thermal circulation loop and a testing pipeline, wherein testing units for realizing flow measurement, temperature measurement and pressure measurement are arranged on the mixed hydrocarbon loop, the air loop, the thermal circulation loop and the testing pipeline. The test system can provide a perfect hardware test platform for the influence of each influence factor under single action or multiple actions on the combustion performance of the mixed gas in the air-mixed gas making process, and finally provides accurate data support for the development of various hydrocarbon air-mixed gas devices; the invention also aims to provide a testing method based on the air-fuel mixture combustion performance testing system, so as to ensure the testing efficiency.
Description
Technical Field
The invention relates to the technical field of testing of combustion performance of various hydrocarbon air-mixed fuel gases, in particular to a system and a method for testing the combustion performance of air-mixed fuel gases.
Background
The air-mixed fuel gas is C5A plurality of mixed hydrocarbon liquid fuels having a gaseous heating value of about 37495.9kcal/m3Air is mixed in a certain proportion during use so as to control the heat value of the air to be 5500-9500 kcal/m3Within the range of (1). The air-mixed fuel gas has rich sources, has the advantages of high safety coefficient, low investment, short period, moderate price and the like, meets the requirements of comprehensive utilization, energy conservation and environmental protection, can be compared favorably with three conventional energy sources, namely liquefied petroleum gas, artificial gas and natural gas, so that the air-mixed fuel gas can effectively reduce the atmospheric environmental pollution and improve the utilization efficiency of social energy by reasonably developing and comprehensively utilizing the mixed hydrocarbon raw material, and has an extremely important promoting effect on relieving the current situation of energy shortage in China.
Practice proves that air is blown into a storage tank filled with liquid hydrocarbon fuel, the liquid hydrocarbon is evaporated and attached to the surface of air bubbles to form air-mixed fuel gas, and the air-mixed fuel gas is conveyed to combustion equipment through a pipeline, so that the gas making process has wide application prospect. However, since the influence of each influencing factor such as air flow rate temperature, mixed hydrocarbon component, air distributor structure, etc. on the gas production process under single action or multiple actions is not clear, and the hydrocarbon content in the mixed air gas cannot be accurately controlled in real time according to the field conditions, the research work on the influence of each influencing factor under single action or multiple actions on the combustion performance of the mixed air gas in the process of producing the gas from the mixed air gas is urgently needed.
Disclosure of Invention
One of the purposes of the invention is to overcome the defects of the prior art and provide a mixed air gas combustion performance test system with a reasonable and practical structure, so that a perfect hardware test platform can be provided for the influence of each influence factor under single action or multiple actions on the mixed gas combustion performance in the process of preparing the mixed air gas, and finally, accurate data support is provided for the development of various hydrocarbon mixed air gas devices; the invention also aims to provide a testing method based on the air-mixed fuel gas combustion performance testing system, so that the testing efficiency is ensured.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a mix empty gas combustion performance test system which characterized in that: the test system comprises a mixed hydrocarbon loop, an air loop and a heat circulation loop, wherein:
mixed hydrocarbon loop: the device comprises a hydrocarbon material tank, wherein a manual valve V1, a hydrocarbon circulating pump, a manual valve V2 and a check valve CV1 are sequentially arranged at a discharge port of the hydrocarbon material tank along the advancing direction of light hydrocarbon, and an outlet of the check valve CV1 is communicated with an air-mixed gas storage tank; the mixed hydrocarbon circuit also comprises a regulating valve FV1, which regulating valve FV1 bridges between the outlet of the manual valve V2 and the outlet of the manual valve V1;
an air circuit: the air-mixing fuel gas storage tank comprises a fan, wherein an outlet of the fan is communicated to a gas path inlet of an air buffer tank through a manual valve V21, one gas path outlet of the air buffer tank is communicated to an inlet of the fan through a regulating valve FV21, and the other gas path outlet of the air buffer tank is communicated to the air-mixing fuel gas storage tank through a pneumatic switch valve XV21, a manual valve V22 and a check valve CV21 in sequence;
the heat circulation loop is used for realizing the on-line heating function of the air-mixed fuel gas in the air-mixed fuel gas storage tank and the air in the air buffer tank;
the test system also comprises a test pipeline, wherein the test pipeline comprises a vacuum pump for vacuumizing the mixed hydrocarbon loop and the air-mixed fuel gas storage tank, an oxygen content analyzer for detecting the content of hydrocarbon in the air-mixed fuel gas, a gas chromatograph for detecting the content of hydrocarbon components in the air-mixed fuel gas and a burner; the outlet of the air-mixed gas storage tank is communicated with the gas inlet of the combustor through a check valve CV22, a manual valve V23 and a manual valve V24, and the outlet of the air-mixed gas storage tank is communicated with the vacuum pump, the oxygen content analyzer and the gas chromatograph through a check valve CV22, a manual valve V23 and a manual valve V25 respectively;
and the mixed hydrocarbon loop, the air loop, the thermal circulation loop and the test pipeline are respectively provided with a test unit for realizing flow measurement, temperature measurement and pressure measurement.
Preferably, the heat circulation loop consists of an air-mixed fuel gas heating loop and an air heating loop; in the air-mixed fuel gas heating loop, hot water flows from the electric heating water tank, sequentially flows through a manual valve V31, a hot water circulating pump, a manual valve V33, an air-mixed fuel gas storage tank, a manual valve V34 and a manual valve V37, and then flows back to the electric heating water tank; in the air heating loop, hot water flows from the electric heating water tank, and then flows back to the electric heating water tank through a manual valve V31, a hot water circulating pump, an adjusting valve FV31, a manual valve V35, an air buffer tank, a manual valve V36 and a manual valve V37 in sequence; and a manual valve V32 is bridged between the inlet of the manual valve V37 and the outlet of the hot water circulating pump.
Preferably, the test unit includes a flow test component, a pressure test component and a temperature test component, wherein:
the flow testing assembly comprises a flow meter F1 arranged between the check valve CV1 and the air-mixing gas storage tank, a flow meter F2 arranged between the pneumatic switch valve XV21 and the manual valve V22, a flow meter F3 arranged at the outlet of the manual valve V23 and used for calculating the total flow of the air-mixing gas at the outlet of the air-mixing gas storage tank, a flow meter F4 arranged at the inlet and the outlet of the regulating valve FV31 and used for calculating the total flow of hot water, and a flow meter F5 used for calculating the flow of the hot water entering the air buffer tank separately;
the pressure testing assembly comprises a pressure gauge P1 for testing the hydrocarbon pressure in the hydrocarbon material tank, a pressure gauge P2 arranged between a fan and a manual valve V21, a pressure gauge P3 for testing the gas circuit pressure in the air buffer tank, a pressure gauge P4 arranged between a pneumatic switch valve XV21 and a flow meter F2, a pressure gauge P5 arranged between a manual valve V23 and a flow meter F3, a pressure gauge P6 arranged between a manual valve V33 and an air-mixed gas storage tank, a pressure gauge P7 arranged between a manual valve V34 and an air-mixed gas storage tank, a pressure gauge P8 arranged between a manual valve V35 and the air buffer tank, a pressure gauge P9 arranged between a manual valve V36 and the air buffer tank, and a pressure gauge P10 for testing the pressure in the air-mixed gas storage tank;
the temperature testing assembly comprises a thermometer T1 for testing the temperature of hydrocarbons in the hydrocarbon material tank, a thermometer T2 arranged between a manual valve V21 and the air buffer tank, a thermometer T3 for testing the temperature of an air circuit in the air buffer tank, a thermometer T4 arranged between a pneumatic switch valve XV21 and a flow meter F2, a thermometer T5 arranged between a manual valve V23 and the flow meter F3, a thermometer T6 arranged between the manual valve V33 and the air-mixed fuel gas storage tank, a thermometer T7 arranged between the manual valve V34 and the air-mixed fuel gas storage tank, a thermometer T8 arranged between the manual valve V35 and the air buffer tank, a thermometer T9 arranged between the manual valve V36 and the air buffer tank, and a thermometer T10 and a thermometer T11 for testing the temperature in the air-mixed fuel gas storage tank; a mixed hydrocarbon level gauge LG is bridged between the thermometer T10 and the thermometer T11.
Preferably, the hydrocarbon circulation pump is a diaphragm pump.
Preferably, a gas distributor for ensuring that air uniformly passes through the liquid phase space of the hydrocarbon medium is arranged in the air-mixed gas storage tank.
Preferably, the test method applying the air-fuel mixture combustion performance test system is characterized by comprising the following steps of:
1) before the test is started, vacuumizing the mixed hydrocarbon loop and the air-mixed gas storage tank to about 10Pa, and starting a hydrocarbon circulating pump to fill media into the air-mixed gas storage tank to a specified test working condition;
2) opening a pneumatic switch valve XV21, a manual valve V21, a manual valve V22, a manual valve V23 and a manual valve V24, setting the working frequency of a fan, adjusting the hot water flow at an air heating loop, preheating the air in an air buffer tank to a test working condition, and bubbling the air into the bottom of the air-mixing fuel gas storage tank through a pipeline;
3) the hydrocarbon medium is evaporated towards the gas phase in the bubbles and on the liquid level to form the air-mixed fuel gas, the hydrocarbon air-mixed fuel gas is led out to the combustor through a pipeline, then the manual valve V25 is opened, the air-mixed fuel gas is sampled, the oxygen content of the air-mixed fuel gas is detected through an oxygen content analyzer, and the hydrocarbon content in the air-mixed fuel gas is calculated according to the detection result; after the hydrocarbon content in the air-mixed fuel gas meets the requirements, detecting the content of each hydrocarbon component in the air-mixed fuel gas through a gas chromatograph, calculating the combustion heat value and the whitening number of the air-mixed fuel gas, and recording the pressure, the temperature and the flow value of each test point under the stable working condition through each test unit distributed in the system.
Preferably, in the testing process, the liquid level of the hydrocarbon medium in the air-fuel gas storage tank is adjusted to a specified working condition value through frequency conversion adjustment of the hydrocarbon circulating pump and cooperative control of the testing unit and the adjusting valve FV1 at the mixed hydrocarbon loop; adjusting the working frequency of a fan, and simultaneously controlling the air flow to a specified working condition value in a linkage manner by adjusting a valve FV21 and a test unit at an air loop; the working frequency of the hot water circulating pump is adjusted, and simultaneously the liquid hydrocarbon temperature in the air-mixed fuel gas storage tank and the air temperature at the outlet of the air buffer tank are stabilized to the specified working condition value through the adjustment valve FV31 and the interlocking control of the testing unit at the thermal circulation loop; and after the working condition values are stable, recording the pressure, temperature and flow values of all the test points of the whole system.
The invention has the beneficial effects that:
1) the system can simulate the technological process of preparing various hydrocarbon mixed air fuel gas by air bubbling.
2) Before the test is started, the system is vacuumized through a vacuum pump, so that the purity of the medium and the safety of the system can be ensured; meanwhile, the flow regulating unit is arranged, so that the test working conditions under the conditions of different air flow rates and different light hydrocarbon flow rates can be met; and the temperature adjusting unit is arranged, so that test working conditions under different air temperatures and different light hydrocarbon temperatures can be realized.
3) And because the air distributor is arranged in the air-mixed gas storage tank, research on the influence of different air distributor structures on the gas production process can be carried out.
4) An oxygen content analyzer is arranged to ensure the safety of the test system; the gas chromatograph is arranged, so that hydrocarbon components in the air-mixed fuel gas can be detected, and the combustion heat value and the white count of the air-mixed fuel gas can be calculated.
Obviously, through the structure, the device can form an independent three-dimensional test platform, so that the process of producing hydrocarbon and air mixed gas by air bubbling can be repeatedly reproduced for multiple times, the influence research on the process of producing hydrocarbon and air mixed gas by bubbling under the single action or the multiple action of multiple factors including the temperature of mixed hydrocarbon, the flow rate of mixed hydrocarbon, the components of mixed hydrocarbon, the air temperature, the air flow, the structure of an air distributor and the like can be developed on line, the correlation between the combustion performance of the air mixed gas and each influence factor can be formed, the gas production process of the air mixed gas can be accurately regulated and controlled in real time according to the field conditions, and finally, accurate data support is provided for the development of various hydrocarbon air mixed gas devices.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
The actual correspondence between each label and the part name of the invention is as follows:
1-hydrocarbon material tank 2-hydrocarbon circulating pump 3-fan 4-air buffer tank
5-mixed air gas storage tank 6-vacuum pump 7-oxygen content analyzer 8-gas chromatograph
9-combustor 10-electric heating water tank 11-hot water circulating pump
Detailed Description
For ease of understanding, the specific structure and workflow of the present invention is further described herein as follows:
the specific implementation structure of the invention can be seen in fig. 1, and the whole system consists of a mixed hydrocarbon loop, an air loop, a heat circulation loop and a test pipeline, wherein:
the mixed hydrocarbon loop comprises a hydrocarbon material tank 1, a manual valve V1, a hydrocarbon circulating pump 2, a manual valve V2, a check valve CV1 and a flow meter F1 which are sequentially connected through a pipeline, wherein the outlet of the flow meter F1 is connected with an air-mixed fuel gas storage tank 5; meanwhile, the regulating valve FV1 bridges between the outlet of the manual valve V2 and the outlet of the manual valve V1 to form a loop. A thermometer T1 and a pressure gauge P1 for measuring the internal temperature and pressure are disposed at the hydrocarbon material tank 1.
The air loop comprises a fan 3, a pressure gauge P2, a manual valve V21 and a thermometer T2 which are sequentially connected through a pipeline, and the outlet of the thermometer T2 is connected with an air buffer tank 4; one of the gas path outlets of the air buffer tank 4 is connected to the blower 3 via a regulating valve FV21 to form a loop. The other gas path outlet of the air buffer tank 4 is sequentially connected with a pneumatic switch valve XV21, a thermometer T4, a pressure gauge P4, a flow meter F2, a manual valve V22 and a check valve CV21 through pipelines and finally communicated to the air-mixed gas storage tank 5. The air buffer tank 5 is provided with a pressure gauge P3 and a temperature gauge T3 for detecting the pressure and temperature in the tank.
In the air-mixing fuel gas heating loop, hot water flows from the electric heating water tank 10, sequentially passes through a manual valve V31, a hot water circulating pump 11, a flow meter F4, a manual valve V33, a pressure gauge P6, a thermometer T6, an air-mixing fuel gas storage tank 5, a pressure gauge P7, a thermometer T7, a manual valve V34 and a manual valve V37, and then flows back to the electric heating water tank 10. In the air heating loop, hot water flows from the electric heating water tank 10, sequentially flows through a manual valve V31, a hot water circulating pump 11, a flow meter F4, a regulating valve FV31, a flow meter F5, a manual valve V35, a pressure gauge P8, a thermometer T8, an air buffer tank 4, a pressure gauge P9, a thermometer P9, a manual valve V36 and a manual valve V37, and then flows back to the electric heating water tank 10; and a manual valve V32 is bridged between the inlet of the manual valve V37 and the outlet of the hot water circulating pump 11.
The testing pipeline comprises a vacuum pump 6 for vacuumizing the mixed hydrocarbon loop and the air-mixed fuel gas storage tank 5, an oxygen content analyzer 7 for detecting the content of hydrocarbon in the air-mixed fuel gas, a gas chromatograph 8 for detecting the content of hydrocarbon components in the air-mixed fuel gas and a combustor 9. The outlet of the air-fuel mixture storage tank 5 is communicated with the air inlet of the combustor 9 through a check valve CV22, a manual valve V23, a pressure gauge P5, a thermometer T5, a flowmeter F3 and a manual valve V24. The outlet of the air-fuel mixture tank 5 is also connected to the vacuum pump 6, the oxygen content analyzer 7, and the gas chromatograph 8 via a check valve CV22, a manual valve V23, a pressure gauge P5, a thermometer T5, a flow meter F3, and a manual valve V25, respectively. A pressure gauge P10, a temperature gauge T11 and a temperature gauge T12 for detecting the pressure and the temperature in the mixed air gas storage tank 5 are arranged, and a mixed hydrocarbon liquid level gauge LG is bridged between the temperature gauge T11 and the temperature gauge T12.
The actual test flow of the test system comprises the following steps:
1) before the test is started, vacuumizing the mixed hydrocarbon loop and the air-mixed gas storage tank to about 10Pa, and starting a hydrocarbon circulating pump to fill media into the air-mixed gas storage tank to a specified test working condition;
2) opening a pneumatic switch valve XV21, a manual valve V21, a manual valve V22, a manual valve V23 and a manual valve V24, setting the working frequency of a fan, adjusting the hot water flow at an air heating loop, preheating the air in an air buffer tank to a test working condition, and bubbling the air into the bottom of the air-mixing fuel gas storage tank through a pipeline;
3) the hydrocarbon medium is evaporated to the gas phase in the bubbles and on the liquid level to form mixed air fuel gas, the hydrocarbon mixed air fuel gas is led out to the combustor through a pipeline, then the manual valve V25 is opened, the mixed air fuel gas is sampled, the oxygen content of the mixed air fuel gas is detected through an oxygen content analyzer, and the hydrocarbon content in the mixed air fuel gas is calculated according to the detection result; after the hydrocarbon content in the air-mixed fuel gas meets the requirements, detecting the content of each hydrocarbon component in the air-mixed fuel gas through a gas chromatograph, calculating the combustion heat value and the whitening number of the air-mixed fuel gas, and recording the pressure, the temperature and the flow value of each test point under the stable working condition through each test unit distributed in the system.
In the above testing process, the temperature adjusting function of the air-mixed fuel gas in the air-mixed fuel gas storage tank 5 and the air in the air buffer tank 4 can be realized through the opening and closing adjustment of the corresponding valve path in the thermal circulation loop and the linkage control of the corresponding testing unit. The liquid level of the hydrocarbon medium in the air-mixed fuel gas storage tank 5 can be adjusted to a specified working condition value through the frequency conversion adjustment of the hydrocarbon circulating pump and the cooperative control of the testing unit and the adjusting valve FV1 at the mixed hydrocarbon loop. Adjusting the working frequency of the fan 3, and simultaneously controlling the air flow to a specified working condition value in a linkage manner by adjusting a valve FV21 and a test unit at an air circuit; the working frequency of the hot water circulating pump 11 is adjusted, and simultaneously the liquid hydrocarbon temperature in the air-mixed fuel gas storage tank 5 and the air temperature at the outlet of the air buffer tank 4 are stabilized to the specified working condition value through the chain control of the adjusting valve FV31 and the testing unit at the thermal circulation loop. And after the working condition values are stable, recording the pressure, temperature and flow values of all test points of the whole system.
In actual operation, the hydrocarbon material tank 1 and the air-fuel mixture storage tank 5 should be provided with a safety valve SV and a corresponding discharge port to achieve the purpose of safe use.
In the test process, the vacuum pump 6 is arranged in the test system to vacuumize the mixed hydrocarbon loop and the air-mixed gas storage tank 5 so as to ensure the purity of the medium and the safety of the system. And an air buffer tank 4 is arranged at the outlet of the fan 3, so that the stable control of the pressure in the test system is realized. The air buffer tank 4 can adopt a structure with a built-in coil pipe, and the stable control of the air temperature is realized by changing the flow rate of hot water in the coil pipe.
The hydrocarbon circulating pump 6 can adopt a diaphragm pump which does not need lubrication and has good sealing performance, and the conveying medium does not contact any lubricant, thereby not generating any pollution and ensuring the purity of the light hydrocarbon medium. The outlet of the hydrocarbon circulating pump 6 is provided with a regulating valve FV1, and the flow of the hydrocarbon medium can be accurately controlled by interlocking control of the regulating valve FV1 and the flow meter F1.
The air-mixing fuel gas storage tank 5 can be internally provided with a gas distributor to ensure that air uniformly passes through a hydrocarbon medium liquid phase space. The air-mixing gas storage tank 5 adopts a structure with a built-in U-shaped pipe, and the temperature of a hydrocarbon medium in the air-mixing gas storage tank 5 is stably controlled by adjusting the flow of hot water entering and exiting the U-shaped pipe.
In addition, this test system has still set up oxygen content analyzer 7 and has detected the empty gas that mixes, treats that hydrocarbon content in the empty gas that mixes is higher than its explosion limit more than twice, sends the empty gas that mixes to the combustor burning again, guarantees the safety of system. A gas chromatograph 8 is arranged to detect the hydrocarbon component content of the mixed air fuel gas, and the combustion heat value and the white number of the mixed air fuel gas are calculated according to the detection result.
The design of the heat circulation loop can simultaneously meet the requirements of adjusting the temperature of the light medium in the air-mixed fuel gas storage tank 5 and the air temperature in the air buffer tank 4 through one set of heat circulation loop, thereby reducing the equipment investment. The working frequency of the hot water circulating pump 11 is adjusted, and simultaneously the temperature of the liquid hydrocarbon in the air-mixed fuel gas storage tank 5 and the temperature of the air at the outlet of the air buffer tank 4 can be stabilized to required working condition values through the interlocking control of the adjusting valve FV31 and each thermometer.
Of course, the above is one specific embodiment of the present invention. In actual operation, equivalent replacement of the types of the manual valves as the switch parts, such as replacement of manual valves by electric valve structures, or expansion or deletion of the functions of the test system by adding or deleting functional parts such as the oxygen content analyzer 7, etc., even the test system can be used for various hydrocarbon mixed air fuel gases rather than air light hydrocarbon mixed fuel gases, etc., and such conventional structural changes or applications based on the known test system structure functions should be regarded as equivalent or similar designs and fall within the protection scope of the present invention.
Claims (7)
1. The utility model provides a mix empty gas combustion performance test system which characterized in that: the test system comprises a mixed hydrocarbon loop, an air loop and a heat circulation loop, wherein:
mixed hydrocarbon loop: the device comprises a hydrocarbon material tank (1), wherein a manual valve V1 and a hydrocarbon circulating pump (2) are sequentially arranged at a discharge outlet of the hydrocarbon material tank (1) along the advancing direction of light hydrocarbon, the manual valve V2 and a check valve CV1 are arranged, and an outlet of a check valve CV1 is communicated with an air-mixed fuel gas storage tank (5); the mixed hydrocarbon circuit also comprises a regulating valve FV1, which regulating valve FV1 bridges between the outlet of the manual valve V2 and the outlet of the manual valve V1;
an air circuit: the air-mixing fuel gas storage tank comprises a fan (3), wherein an outlet of the fan (3) is communicated to an air path inlet of an air buffer tank (4) through a manual valve V21, one air path outlet of the air buffer tank (4) is communicated to an inlet of the fan (3) through a regulating valve FV21, and the other air path outlet of the air buffer tank (4) is communicated to the air-mixing fuel gas storage tank (5) through a pneumatic switch valve XV21, a manual valve V22 and a check valve CV21 in sequence;
the heat circulation loop is used for realizing the function of on-line heating of the air-mixed fuel gas in the air-mixed fuel gas storage tank (5) and the air in the air buffer tank (4);
the testing system also comprises a testing pipeline, wherein the testing pipeline comprises a vacuum pump (6) for vacuumizing the mixed hydrocarbon loop and the air-mixed fuel gas storage tank (5), an oxygen content analyzer (7) for detecting the content of hydrocarbon in the air-mixed fuel gas, a gas chromatograph (8) for detecting the content of hydrocarbon components in the air-mixed fuel gas and a combustor (9); the outlet of the air-fuel mixture storage tank (5) is communicated with the air inlet of a combustor (9) through a check valve CV22, a manual valve V23 and a manual valve V24, and the outlet of the air-fuel mixture storage tank (5) is communicated with the vacuum pump (6), the oxygen content analyzer (7) and the gas chromatograph (8) through a check valve CV22, a manual valve V23 and a manual valve V25 respectively;
and the mixed hydrocarbon loop, the air loop, the thermal circulation loop and the test pipeline are respectively provided with a test unit for realizing flow measurement, temperature measurement and pressure measurement.
2. The air-fuel mixture combustion performance testing system according to claim 1, characterized in that: the heat circulation loop consists of an air-mixing fuel gas heating loop and an air heating loop; in the air-mixed fuel gas heating loop, hot water flows from the electric heating water tank (10) and then flows back to the electric heating water tank (10) through the manual valve V31, the hot water circulating pump (11), the manual valve V33, the air-mixed fuel gas storage tank (5), the manual valve V34 and the manual valve V37 in sequence; in the air heating loop, hot water flows from the electric heating water tank (10) and sequentially flows through a manual valve V31, a hot water circulating pump, an adjusting valve FV31, a manual valve V35, an air buffer tank (4), a manual valve V36 and a manual valve V37 and then flows back to the electric heating water tank (10); a manual valve V32 is bridged between the inlet of the manual valve V37 and the outlet of the hot water circulating pump (11);
the air buffer tank (4) adopts a structure with a built-in coil pipe, and the stable control of the air temperature is realized by changing the flow rate of hot water in the coil pipe;
the air-mixing gas storage tank (5) adopts a structure with a built-in U-shaped pipe, and the temperature of a hydrocarbon medium in the air-mixing gas storage tank (5) is stably controlled by adjusting the flow of hot water entering and exiting the U-shaped pipe.
3. The air-fuel mixture combustion performance test system according to claim 1 or 2, characterized in that: the test unit includes flow test subassembly, pressure test subassembly and temperature test subassembly, wherein:
the flow test assembly comprises a flow meter F1 arranged between a check valve CV1 and the air-mixed fuel gas storage tank (5), a flow meter F2 arranged between a pneumatic switch valve XV21 and a manual valve V22, a flow meter F3 arranged at the outlet of the manual valve V23 and used for calculating the total flow of the air-mixed fuel gas at the outlet of the air-mixed fuel gas storage tank (5), a flow meter F4 arranged at the inlet and the outlet of a regulating valve FV31 and used for calculating the total flow of hot water, and a flow meter F5 used for calculating the flow of hot water entering the air buffer tank (4) separately;
the pressure testing assembly comprises a pressure gauge P1 for testing the hydrocarbon pressure in the hydrocarbon material tank (1), a pressure gauge P2 arranged between a fan (3) and a manual valve V21, a pressure gauge P3 for testing the air path pressure in the air buffer tank (4), a pressure gauge P4 arranged between a pneumatic switch valve XV21 and a flow meter F2, a pressure gauge P5 arranged between a manual valve V23 and a flow meter F3, a pressure gauge P6 arranged between a manual valve V33 and the air-mixed gas storage tank (5), a pressure gauge P7 arranged between a manual valve V34 and the air-mixed gas storage tank (5), a manual pressure gauge P8 arranged between a manual valve V35 and the air buffer tank (4), a pressure gauge P9 arranged between a manual valve V36 and the air buffer tank (4), and a pressure gauge P10 for testing the pressure in the air-mixed gas storage tank (5);
the temperature testing assembly comprises a thermometer T1 for testing the temperature of hydrocarbons in the hydrocarbon material tank (1), a thermometer T2 arranged between a manual valve V21 and the air buffer tank (4), a thermometer T3 for testing the temperature of air circuits in the air buffer tank (4), a thermometer T4 positioned between a pneumatic switching valve XV21 and a flow meter F2, a thermometer T5 positioned between a manual valve V23 and the flow meter F3, a thermometer T6 arranged between a manual valve V33 and the air-mixed gas tank (5), a thermometer T7 arranged between a manual valve V34 and the air-mixed gas tank (5), a thermometer T8 arranged between a manual valve V35 and the air buffer tank (4), a thermometer T9 arranged between a manual valve V36 and the air buffer tank (4), and a thermometer T10 and a thermometer T11 for testing the temperature in the air-mixed gas tank (5); a mixed hydrocarbon level gauge LG is bridged between the thermometer T10 and the thermometer T11.
4. The air-fuel mixture combustion performance test system according to claim 1 or 2, characterized in that: the hydrocarbon circulation pump (2) is a diaphragm pump.
5. The air-fuel mixture combustion performance test system according to claim 1 or 2, characterized in that: and a gas distributor for ensuring that air uniformly passes through a hydrocarbon medium liquid phase space is arranged in the air-mixed fuel gas storage tank (5).
6. A test method using the air-fuel mixture combustion performance test system of claim 3, characterized by comprising the steps of:
1) before the test is started, vacuumizing the mixed hydrocarbon loop and the air-mixed gas storage tank (5) to about 10Pa, and starting a hydrocarbon circulating pump (2) to fill the air-mixed gas storage tank (5) with media to a specified test working condition;
2) the method comprises the following steps of starting a pneumatic switch valve XV21, a manual valve V21, a manual valve V22, a manual valve V23 and a manual valve V24, setting the working frequency of a fan (3), adjusting the hot water flow at an air heating loop, preheating air in an air buffer tank (4) to a test working condition, and entering the bottom of an air-mixed fuel gas storage tank (5) through a pipeline for bubbling;
3) the hydrocarbon medium is evaporated to the gas phase in the bubbles and on the liquid level to form mixed air fuel gas, the hydrocarbon mixed air fuel gas is led out to the combustor (9) through a pipeline, then the manual valve V25 is opened, the mixed air fuel gas is sampled, the oxygen content of the mixed air fuel gas is detected through the oxygen content analyzer (7), and the hydrocarbon content in the mixed air fuel gas is calculated according to the detection result; after the hydrocarbon content in the air-mixed fuel gas meets the requirements, the content of each hydrocarbon component in the air-mixed fuel gas is detected through a gas chromatograph (8), the combustion heat value and the white number of the air-mixed fuel gas are calculated, and the pressure, the temperature and the flow value of each test point under the stable working condition are recorded through each test unit distributed in the system.
7. A test method according to claim 6, characterized in that: in the test process, the liquid level of a hydrocarbon medium in the air-mixed fuel gas storage tank (5) is adjusted to a specified working condition value through the frequency conversion adjustment of the hydrocarbon circulating pump (2) and the cooperative control of the test unit and the adjusting valve FV1 at the mixed hydrocarbon loop; adjusting the working frequency of the fan (3), and simultaneously controlling the air flow to a specified working condition value in a linkage manner by adjusting a valve FV21 and a test unit at an air circuit; the working frequency of a hot water circulating pump (11) is adjusted, and simultaneously the liquid hydrocarbon temperature in the air-mixed fuel gas storage tank (5) and the air temperature at the outlet of the air buffer tank (4) are stabilized to a specified working condition value through the adjustment valve FV31 and the interlocking control of a testing unit at a thermal circulation loop; and after the working condition values are stable, recording the pressure, temperature and flow values of all the test points of the whole system.
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